2015A&A...583A.106R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:09:15

2015A&A...583A.106R - Astronomy and Astrophysics, volume 583A, 106-106 (2015/11-1)

Modelling the atmosphere of the carbon-rich Mira RU Virginis.

RAU G., PALADINI C., HRON J., ARINGER B., GROENEWEGEN M.A.T. and NOWOTNY W.

Abstract (from CDS):

We study the atmosphere of the carbon-rich Mira RU Vir using the mid-infrared high spatial resolution interferometric observations from VLTI/MIDI. The aim of this work is to analyse the atmosphere of the carbon-rich Mira RU Vir with hydrostatic and dynamic models, in this way deepening the knowledge of the dynamic processes at work in carbon-rich Miras. We compare spectro-photometric and interferometric measurements of this carbon-rich Mira AGB star with the predictions of different kinds of modelling approaches (hydrostatic model atmospheres plus MOD-More Of Dusty, self-consistent dynamic model atmospheres). A geometric model fitting tool is used for a first interpretation of the interferometric data. The results show that a joint use of different kinds of observations (photometry, spectroscopy, interferometry) is essential for shedding light on the structure of the atmosphere of a carbon-rich Mira. The dynamic model atmospheres fit the ISO spectrum well in the wavelength range λ=[2.9, 25.0]µm. Nevertheless, a discrepancy is noticeable both in the SED (visible) and in the interferometric visibilities (shape and level), which is a possible explanation are intra-/inter-cycle variations in the dynamic model atmospheres, as well as in the observations. The presence of a companion star and/or a disk or a decrease in mass loss within the past few hundred years cannot be excluded, but these explanations are considered unlikely.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - instrumentation: high angular resolution - circumstellar matter - stars: atmospheres - stars: AGB and post-AGB - stars: fundamental parameters

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* R Scl C* 01 26 58.0946233986 -32 32 35.437732667 17.26 9.59 5.72 3.69 2.30 C-N5+ 297 0
2 * alf Hya * 09 27 35.24270 -08 39 30.9583 5.14 3.42 1.97 0.93 0.16 K3IIIa 406 0
3 V* V Hya C* 10 51 37.2614060865 -21 15 00.339641553   12.23 6.80     C-N:6 341 0
4 V* RU Vir C* 12 47 18.4075712853 +04 08 41.364022128   14.75 9.00     C8,1e 164 0
5 V* RT Vir AB* 13 02 37.9836301550 +05 11 08.360733054 10.07 9.07 7.41     M8III 293 0
6 * g Cen LP* 13 49 26.7217509 -34 27 02.792908 7.15 5.69 4.19 2.06 0.19 M5-III: 134 0
7 * sig Lib LP* 15 04 04.2160765 -25 16 55.060636 6.86 4.91 3.21 1.60 0.33 M2.5III 173 0
8 V* V Oph C* 16 26 43.7071803249 -12 25 35.815297379   12.91 7.30     C-N:4 129 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...583A.106R and select 'bookmark this link' or equivalent in the popup menu


2020.07.10-02:09:15

© Université de Strasbourg/CNRS

    • Contact